Fixes #33 Add artifactErrorsFailBuild flag

lib/ArtifactGlobber.js

@@ -31,23 +31,31 @@ class FileArtifactGlobber {
     constructor(globber = new Globber_1.FileGlobber()) {
         this.globber = globber;
     }
-    globArtifactString(artifact, contentType) {
+    globArtifactString(artifact, contentType, throwsWhenNoFiles) {
         return artifact.split(',')
             .map(path => FileArtifactGlobber.expandPath(path))
-            .map(pattern => this.globPattern(pattern))
+            .map(pattern => this.globPattern(pattern, throwsWhenNoFiles))
             .reduce((accumulated, current) => accumulated.concat(current))
             .map(path => new Artifact_1.Artifact(path, contentType));
     }
-    globPattern(pattern) {
+    globPattern(pattern, throwsWhenNoFiles) {
         const paths = this.globber.glob(pattern);
         if (paths.length == 0) {
-            FileArtifactGlobber.reportGlobWarning(pattern);
+            if (throwsWhenNoFiles) {
+                FileArtifactGlobber.throwGlobError(pattern);
+            }
+            else {
+                FileArtifactGlobber.reportGlobWarning(pattern);
+            }
         }
         return paths;
     }
     static reportGlobWarning(pattern) {
         core.warning(`Artifact pattern :${pattern} did not match any files`);
     }
+    static throwGlobError(pattern) {
+        throw Error(`Artifact pattern :${pattern} did not match any files`);
+    }
     static expandPath(path) {
         return untildify_1.default(path);
     }